Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee79c1de9452bcdf…

MALICIOUS

PDF

143.4 KB Created: 2021-03-19 22:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5722b71efa9b347e0913525a5a0ecbde SHA-1: 12bda883f42b9279d94f4d439d0757703bd07bd3 SHA-256: ee79c1de9452bcdfd3ddfc853054dcfbd60c4a4f0dccee6fcf958a548a69f275
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/123?utm_term=lake+halbert+fishing+report PDF link annotation
    • http://sparzha.club/wusawipufog3tlvo.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/b327af8f9ba3b0d.pdfIn PDF document text
    • http://shoop-fp.ru/vasuvudisadifiruroxezxugwe.pdfIn PDF document text
    • http://sufofure.mywebcommunity.org/dizaperavupazusi.pdfIn PDF document text
    • https://zufonarupidib.weebly.com/uploads/1/3/4/7/134721949/9861654.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/do_lara_jean_and_peter_end_up_together_in_the_last_book.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/pawaxobexemorixen.pdfIn PDF document text
    • http://com-signto6.xyz/filling_out_forms_exercisese9zwu.pdfIn PDF document text
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/xupevojefexijuwo.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/46732042090.pdfIn PDF document text
    • https://neloramobipetez.weebly.com/uploads/1/3/1/4/131407165/bimonidekosewi-tusika-deruwisodex-vutevi.pdfIn PDF document text
    • http://workbykoder.xyz/how_to_change_jump_force_settings9mwk9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_ab9e03b9278d44718a02dfbefe9f4b28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3d7464-315f-42b8-9fe8-14a909be7db5/nagoluxedaxoxevovok.pdfIn PDF document text
    • http://poborunedajemo.onlinewebshop.net/jazesevedalibebilox.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_66255713a3a74e1888273096c960d426.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/285722f6-fb21-4ec6-8913-925e056f0b1f/wolizajod.pdfIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_cbd4b233c3994f44996aeeddbabd32b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/fegoga.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/17653825827.pdfIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_f0e64d9648274a07bd0b1538c5ff6129.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01624b62-2628-4f71-a1c7-5de1dd68071b/hp_pavilion_dv6_full_specification.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F381 5308 bytes
SHA-256: b4c7a7a29cb337edf5540105246034af9ba42379548ecbefb9ae6f08ba0145f5
font_01_sfnt_off00020590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20590 11896 bytes
SHA-256: 2619bc40fd1c232eb293b5c15363fd34f8162887fe4b9e141df688c9be4f957b